Steam-boiler



l lJ 4 Sheets-Sheet 1. J. LONG.

(Modem 4 Sheets-Sheet 2;

JQLONG.

STEAM BOILER.

No. 256,489. Patented Apr. 18.1882.

4 Sheets-Sheet 3.

(ModeL) J; LONG. STEAM BOILER.

No. 256,489. Patented Apia 18,1882.

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STEAM BOILER.

. 1 (Model.)

r Patented Apr. 18,1882.

UNITED STATES PATENT OFF CE.

JAMES LONG, or WYANDOTTE, KANSAS;

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No; 256,489, dated April 18, 1882.

Application filed AprilQl, 1881. (ModeL) The invention relates to locomotive-boilers, and has for its object lncreased effectiveness of draft and more perfect and economical combustion of fuel than has heretofore been effected.

The improvement consists in constructing the furnace of two distinct and independent fire-boxes separated from each other by a 'water-space. These fire-boxes communicate with the smoke-box by dues in the usual way. 1A

partition in the smoke-box isolates the exhaust-nozzles and separates the two systems of flues from each other, each system discharging into a separate smoke-stack. Separate grates, ash-pans, and fire-doors are used in these furnaces, thus making each complete in itself and independent of the other.

In the accompanying drawings, in which similar letters of reference are used to designate like parts, A represents the fire-boxes; B, the ash-pans; D, the fire-doors, and S the stacks; P, the partition-wall in smoke-box; N,

the exhaust-nozzles, and W the water-space partition separating the fire-boxes.

Figures I and II are vertical and longitudinal sections'of boiler, showing the disposition of parts. In Fig. III the back end of boiler is removed to show fire-boxes in position, one of which is shown partly in section, revealing the flue-sheet at the back. Fi IV is an end view of boiler, showing fire-doors. The manner of constructing and connecting the firedoor openings is also shown in Figs. I and IL Figs. V and VI are transverse sections of the smoke-box, showing the partition P, the smoke stacks S and S, the exhaust-nozzles N and N, and the disposition of the two systems of fines on either side of partition. The partition 1P isolates the exhaustnozzles N and N and separates the two. systems of dues from each other, and forms the dividing-wall between the stacks S and S. In Fig. VI the smokebox is shown enlarged by a ring, I, surrounding the shell of boiler. This enlargement is advantageous where additional room may be required for the construction of duplicate stacks,

lifting-pipes, 860., as in the improvement above I described.

The advantages of the above combination of parts are the following: first, more powerful and effective draft, each furnace and set of flues being operated upon by the full force of the divided blast hitherto used for stimulating double-flue and grate area; secondly, the prolonged interval between exhausts due to the division of the blast effects a more'thorough and intimate combination of air and fuel, generating greater heat and retaining the same long enough in contact with fine-area to secure the best results of combustion; thirdly, the division of flue-area into two equal parts renders the draft through the tines more uniform and less local than heretofore.

Among the minor advantages of the combination may be mentioned the additional area gained in the partition W; the superior circulation of water, due to the water-space separating the two furnaces and systems of fines; the reduced area of the crowns of the fireboxes, which allow of being braced without the use of crown'bars and other incumbrances; and, finally, the improved efliciency and service of the engine constructed with the duplicate boiler, which may at the option of the en gineer be run with either furnace singly or with both, as may be necessary. Thus, if one of the furnaces be damaged or the connecting- -flues be impaired so as to disable the engine each of said divisions being capable of performing the service of an independent boiler, and both having a common shell, in the manner shown and described.

2. The combination, in a locomotive-boiler,

of the divided fire-box, the divided smokebox, and the independent exhaust-nozzles and smoke-stacks, so arranged that each may be used alternately or separately, substantially as shown and described.

Witnesses:

HENRY C. DARBY, JAMES E. LONG.

JAMES LONG. 

